Distribution of Mesozooplankton during Spring and Autumn across the Frontal Zone of South Sea, Korea
Tóm tắt
We investigated the distributional pattern of mesozooplankton and the related environmental characteristics across the frontal zone in the South Sea of Korea during spring and autumn 2016. The frontal zone (FZ) was formed by Korean Southern Coastal Waters and Tsushima Warm Current, and the physical structure of front was more distinct during autumn than spring. The peaks of mesozooplankton abundance were not coincident (p > 0.05) with peaks of integrated chlorophyll-a (chl-a) concentrations (spring: chl-a = 44.5 mg m−2 at FZ, mesozooplankton = 8,198 inds.m−3 at coastal zone (CZ); autumn: chl-a=141.2 mg m−2 at CZ, mesozooplankton = 5,412 inds.m−3 at FZ). Cluster analysis divided the mesozooplankton community into FZ, CZ and offshore zone (OZ) mainly by the dominant copepods (adult and immature) during both seasons that was associated with chl-a based on principal component analysis. All the zones were characterized by temporal difference in occurrence of copepods, which can be explained by the cyclopoid-to-calanoid (Cy:Ca) ratio. Cy:Ca ratio was dependent mainly on the co-occurrence of higher concentrations of chl-a and cyclopoids at each zone between spring and autumn. Paracalanus copepodites dominated at all stations across the FZ during both periods. Cy:Ca ratio at FZ in spring showed a distinctively higher value than that of CZ and OZ, whereas the pattern was the opposite in autumn. These results indicated that the temporal distribution of mesozooplankton across the frontal zone in the South Sea was mainly characterized by the zonal characteristics of FZ, unlike CZ and OZ, and was the result of temporal differences in chl-a concentrations and the associated increase of cyclopoid copepods (Oithona spp.).
Tài liệu tham khảo
Acha EM, Mianzan HW, Guerrero RA, Favero M, Bava J (2004) Marine fronts at the continental shelves of austral South America: physical and ecological processes. J Marine Syst 44(1):83–105
Acha EM, Piola A, Iribarne O, Mianzan H (2015) Ecological processes at marine fronts: oases in the ocean. Springer, 68 p
Albaina A, Irigoien X (2004) Relationships between frontal structures and zooplankton communities along a cross-shelf transect in the Bay of Biscay (1995 to 2003). Mar Ecol-Prog Ser 284:65–75
Andersen V, Devey C, Gubanova A, Picheral M, Melnikov V, Tsarin S, Prieur L (2004) Vertical distributions of zooplankton across the Almeria—Oran frontal zone (Mediterranean Sea). J Plankton Res 26(3):275–293
Arfi R, Guiral D (1994) Chlorophyll budget in a productive tropical pond: algal production, sedimentation, and grazing by microzooplankton and rotifers. Hydrobiologia 272(1–3):239–249
Boucher J, Ibanez F, Prieur L (1987) Daily and seasonal variations in the spatial distribution of zooplankton populations in relation to the physical structure in the Ligurian Sea Front. J Mar Res 45(1):133–173
Brito SL, Maia-Barbosa PM, Pinto-Coelho RM (2011) Zooplankton as an indicator of trophic conditions in two large reservoirs in Brazil. Lakes Reservoirs 16(4):253–264
Castellani C, Irigoien X, Harris RP, Lampitt RS (2005) Feeding and egg production of Oithona similis in the North Atlantic. Mar Ecol-Prog Ser 288:173–182
Choi JK (1991) The influence of the tidal front on primary productivity and distribution of phytoplankton in the mideastern coast of Yellow Sea. J Oceanol Soc Korea 26(3):223–241
Chihara M, Murano M (1997) An illustrated guide to marine plankton in Japan. Tokai University Press, Tokyo, 1574 p
Claustre H, Kerhervé P, Marty JC, Prieur L, Videau C, Hecq JH (1994) Phytoplankton dynamics associated with a geostrophic front: ecological and biogeochemical implications. J Mar Res 52(4):711–742
Gong Y (1971) A study on the South Korean coastal front. J Oceanol Soc Korea 6(1):25–36
Hwang JS, Souissi S, Tseng LC, Seuront L, Schmitt FG, Fang LS, Wei TP (2006) A 5-year study of the influence of the northeast and southwest monsoons on copepod assemblages in the boundary coastal waters between the East China Sea and the Taiwan Strait. J Plankton Res 28(10):943–958
Jang MC, Baek SH, Jang PG, Lee WJ, Shin KS (2012) Patterns of zooplankton distribution as related to water masses in the Korea Strait during winter and summer. Ocean Polar Res 34(1):37–51
Kang YS, Hong SY (1995) Copepods and their relationship to hydrographic. Bull Plankton Soc Japan 42(1):29–41
Kang YS, Jeon KA (1999) Biological and chemical characteristics and trophodynamics in the frontal zone in the southern waters of Korea. J Korean Fish Soc 32(1):22–29
Kang JH, Kim WS, Shim JH (2002) Species composition and abundance of zooplankton community in spring and autumn around Dokdo. Ocean Polar Res 24(4):407–417
Kang JH, Kim WS, Chang KI, Noh JH (2004) Distribution of plankton related to the mesoscale physical structure within the surface mixed layer in the southwestern East Sea, Korea. J Plankton Res 26(12):1515–1528
Kang JH, Kim WS, Chang KI (2008) Latitudinal distribution of mesozooplankton in the off-equatorial northeastern Pacific before and after the 1998/99 La Niña event. Mar Environ Res 65(3):218–234
Kim JI, Kim JY, Choi YK, Oh HJ, Chu EK (2005) Distribution of the anchovy eggs associated with coastal frontal structure in Southern Coastal waters of Korea. Korean J Ichthyol 17(3):205–216
Maar M, Visser AW, Nielsen TG, Stips A, Saito H (2006) Turbulence and feeding behaviour affect the vertical distributions of Oithona similis and Microsetella norwegica. Mar Ecol-Prog Ser 313:157–172
Mcginty N, Johnson MP, Power AM (2014) Spatial mismatch between phytoplankton and zooplankton biomass at the Celtic Boundary Front. J Plankton Res 36(6):1446–1460
Ohtsuka S, Kubo N, Okada M, Gushima K (1993) Attachment and feeding of pelagic copepods on larvacean houses. J Oceanogr 49(1):115–120
Park C, Choi JK (1997) Zooplankton community in the front zone of the East Sea of Korea (the Sea of Japan): 1. Species list, distribution of dominant taxa, and species association. Korean J Fish Aquat Sci 30(2):225–238
Parsons TR, Maita Y, Lalli CM (1984) Determination of chlorophylls and total carotenoids: spectrophotometric method. In: Parsons TR, Maita Y, Lalli CM (eds) A manual of chemical and biological methods for seawater analysis. Pergamon Press, Oxford, pp 101–112
Pingree RD, Holligan PM, Mardell GT (1978) The effects of vertical stability on phytoplankton distributions in the summer on the northwest European Shelf. Deep Sea Res 25(11):1011–1028
Purcell JE (1992) Effects of predation by the scyphomedusan Chrysaora quinquecirrha on zooplankton populations in Chesapeake Bay, USA. Mar Ecol-Prog Ser 87:65–76
Roman MR, Dam HG, Gauzens AL, Urban-Rich J, Foley DG, Dickey TD (1995) Zooplankton variability on the equator at 140 W during the JGOFS EqPac study. Deep-Sea Res Pt II 42(2–3):673–693
Roman MR, Gauzens AL (1997) Copepod grazing in the equatorial Pacific. Limnol Oceanogr 42(4):623–634
Son YT, Lee SH, Choi BJ, Lee JC (2010) Frontal structure and thermohaline intrusions in the South Sea of Korea from observed data and a relocation method. J Geophys Res-Oceans 115(C2):1–19
Tanaka G (2008) Recent benthonic ostracod assemblages as indicators of the Tsushima Warm Current in the southwestern Sea of Japan. Hydrobiologia 598(1):271–284
Teague WJ, Jacobs GA, Perkins HT, Book JW, Chang KI, Suk MS (2002) Low-frequency current observations in the Korea/ Tsushima Strait. J Phys Oceanogr 32(6):1621–1641
Yang YJ, Kim SH, Rho HK (1998) A study on the temperature fronts observed in the south-west sea of Korea and the northern area of the East China Sea. Korean J Fish Aquat Sci 31(5):695–706
Yang YJ, Kim SH, Rho HK, Jeong DG (1999) Relationship between SST fronts and purse-seine fishing grounds in the South-West Sea of Korea and the northern area of the East China Sea. Korean J Fish Aquat Sci 32(5):618–623
Youssara F, Gaudy R (2001) Variations of zooplankton in the frontal area of the Alboran sea (Mediterranean sea) in winter 1997. Oceanol Acta 24(4):361–376